Mulberry silk refers to the silk made from the cocoons of the larvae of Mulberry silkworms reared in captivity. The entire production process is carefully monitored and the environment of the silkworm larvae strictly controlled to allow the larvae to spin silk threads that are rounder, finer, smoother, lighter and more uniformly colored than any other type of silk in the world. Mulberry silk fibers are also extremely strong, easily beating steel fibers of the same diameter in strength and durability.